"Cygnus X-1" meaning in English

See Cygnus X-1 in All languages combined, or Wiktionary

Proper name

Etymology: From Cygnus + X + 1. From being the first discovered discrete astronomical X-ray source (an X-ray star) located in the constellation of Cygnus. Etymology templates: {{compound|en|Cygnus|X|1}} Cygnus + X + 1 Head templates: {{en-proper-noun}} Cygnus X-1
  1. A placename.
    (astronomy, physics) The first generally accepted and confirmed black hole. A black hole in a high-mass X-ray binary (HMXB) with a blue supergiant companion (HD 226868), located in the constellation Cygnus.
    Synonyms: Cyg X-1 [abbreviation] Derived forms: Cyg X-1 [abbreviation]
    Sense id: en-Cygnus_X-1-en-name-qC2w1H4F Categories (other): Astronomy, Physics, Stars, English entries with incorrect language header, Pages with 1 entry, Pages with entries, Black holes Disambiguation of English entries with incorrect language header: 55 45 Disambiguation of Pages with 1 entry: 52 48 Disambiguation of Pages with entries: 51 49 Disambiguation of Black holes: 55 45 Topics: astronomy, natural-sciences, physical-sciences, physics
  2. A placename.
    (astronomy, physics) The high-mass X-ray binary star system containing this black hole and blue supergiant star.
    Sense id: en-Cygnus_X-1-en-name-U9NQTxMk Categories (other): Astronomy, Physics, Stars, English entries with incorrect language header, Pages with 1 entry, Pages with entries, Black holes Disambiguation of English entries with incorrect language header: 55 45 Disambiguation of Pages with 1 entry: 52 48 Disambiguation of Pages with entries: 51 49 Disambiguation of Black holes: 55 45 Topics: astronomy, natural-sciences, physical-sciences, physics
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This page is a part of the kaikki.org machine-readable English dictionary. This dictionary is based on structured data extracted on 2025-06-13 from the enwiktionary dump dated 2025-06-01 using wiktextract (9c82c1c and f1c2b61). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.

If you use this data in academic research, please cite Tatu Ylonen: Wiktextract: Wiktionary as Machine-Readable Structured Data, Proceedings of the 13th Conference on Language Resources and Evaluation (LREC), pp. 1317-1325, Marseille, 20-25 June 2022. Linking to the relevant page(s) under https://kaikki.org would also be greatly appreciated.